Sand-molding apparatus



' E. L. TOWLE.

SAND'MOLDING APPARATUS. APPLl'cATloN HLED MAY.\3,191 9.

l [lll/[111111111111111] E. L. TOWLE.

SAND IvIoLDING APPARATUS.

APPLICATION FILED MAY I3, 1919.

- Patented Feb. 28, 1922.

2 SHEETS-SHEET 2.

IIII IIIII'I Ifi 4 III UNITED d STA TES PATENT OFFICE.

ELTON Il. TOWLE, F PATERSON, NEW JERSEY.

SANDMOLDING APPARATUS.

i Application 'filed May 13,

To @ZZA/whom tracy concern machine with controlling mechanism for the Be'tvknown that I, ELTON L. TowLE, a citizen `ot ythe United States,residin at Patersomin the county of Passaic and tate of New Jersey, haveinvented certain new and useful Improvements in Sand-Molding Apparatus,of .which the 'following is a specification.

kThis invention relates to sand molding machines of the type `in whichthe mold is rammed by a jolting action andpthen the pattern is drawn.automatically from the mold.

One of .the'objects ofmy invention ispto provide such a machine inwhich'the stripping of the moldv'and pattern may be done efiicientlykand without any great Y@are on the part of the operator. Another obJectpf my Ainvention is to provide a machine in whichaiiuid pressure can beused bothfor jolt-ing' the mold and kfor lifting it h igh enough so`that the pattern may be withdrawn `from 'the `mold when the latter isheld in its uppermost position. Another object 'of my Vinvention is vtoprovide such a Huid 4pressure of such a character that the simpleoperation of a single lever will suice to bringaboutthevarioussuccessive actions oftheiiiachine withoutlpossibility of coniicttherein. 'With these and other objects in view my invention consists ofcertain novel features 01":construction, combination and arrangement ofparts as will be more fully described an pointed out inthe Aappendedclaims.

In the drawings-Figure 1 is a vertical sectional view of the form ofmachine which I have adopted for Villustrative purposes, this sectionbeing .taken along the center line ofthe machine except one portion,this latter being taken through one ofthe vstripper rods located at oneside of thisr middle section; Fig. 2 is an enlarged vertical sec-:tionflooki'ng toward the Aside of the valve lshown in Fig. 1; Fig. 3 isa view of the F1. .'Ihe corresponding parts are referred to both in thedrawings and in the specification by similar reference characters.

'In' the illustrative form of machine 10 is the base'or kbody portionhaving a c lin- -drical openingtherein at its center. slid- Specicationof Letters Patent.

1919. serial No.=296,s16.

ably mounted =in this opening is a Aplunger 11 provided withsuitablepiston ringsand expanded at its top to `form a-table 12.Normally, this table is inthe position `shown in Figure 1, resting onpieces of fibre 13 on the upper portion of the base 1.0.

Ihe'top of the table 12 may be of any suitable shape and dimensions andin the form illustrated it is rectangular withthe length shown in Figurel'aiidthe widthin Figure 4. i

On the table v12 is supported a stripping meanswhich inthe `formillustrated comprises a member 14 ofthe saine general shape asthe table12 butfhaving acut away portion at its center for ya rpurpose to "bedescribed hereinafter.

Ateach corner 'ofthe table 12 and of the member llifIlp'rovide stripper-rods .15,- each kbeing permanently attached to the member 14 andextending through suitable in the table 12 andthe base 10. If desired,bushings may be provided inthe table V'12 and the base 10 throughwhichthe rods 15 are free'to move.

vOn the member 14 I provide va stripper plate 16 which by means ofdowels 17 is definitely located in relation thereto and in fact operatesas a partv of thestripping means.

In the opening intliemember 111 is a pattern plate 18 resting on thetable 12 to which may be Vattached the'pattern which I have shown in aconventional manner as yat P. The `stripper openings Patented Feb. 28,1922..

plate 16 has as uitable opening for thegpatternPto act in the'wellform aparting line in provide means for olting the Ysand andfor elevating theHask so that the pattern may be drawn, I lprefer to use compressed airacting beneath the bottom of the plunger 11. As a convenient and simplemeans iii which to 'carryout this'purpose I riirst provide inthe-cylinder 10 a number of ports'locatedV at ditferent'heiglits. 20 isytheportthrough which the airpasses when the table is being jolted.' 21is an exhaust port through which the] air passes out r'ofthe Ycylinder11 atselected times. 22 is an elevating port4 through which the air.passes when it is desired yto raise -the'table 12 to the highest point.

"I`hev'plunger llis prol is located thereon by suitable l vided withchannels 23 and 24 leading respectively from the ports 2O and 22 to thelower side of the plunger 11 when the latter is in its lowermostposition. At this time.

Vway valve which in the form illustrated is of the cylindrical typehaving a casing containing a number of ports and a body member rotatablymounted in the Vcasing and having suitable recesses and cylindricalportions to act to close or open the several ports in the variouspositions of the valve.

In the illustrative form, the casing 25 has a cylindrical opening 26 inwhich is mounted a cylindrical body member 27 on the shaft 28, thelatter kbeing controlled b a handle 29 which has a detent 30 adapte tohold the handle 29 in any one of three positions. In the position shownin Figure 3 with the detent 30 engaging a notch 31 in the member 32 thevalve 27 is set so that the table'is jolted. When the handle is turnedso that the detent 30 engages with lthe notch 33 then the valve 27 isset in a position in which the table is elevated and maintained in thiselevated position. When the detent 30 engages the notch 34 the entranceof air to the cylinder 10 is cut off and the exhaust ports are open sothat the table 12 may drop and remain in the lowermost position.

In the casing 25 and communicating with the cylindrical opening 26 is apipe 35 connected to any suitable source of fluid pressure as an aircompressor. Connected to the port 22 by suitable piping isan elevatingort 36 in casing 25. Connected to the jolting port 20 by suitable Pipingis a jolting port 37 incasing 25. `Connected to the exhaust port 21 isan exhaust Vport 38 in casing 25. This casing is also provided with aiinal exhaust port 39 and the body member 27 isprovided with recess 40.

In the position shown in Figure 1; with the pattern and {iask in place,the handle 29 is turned so that the valve 27 is set in the positionshown in Figure 1. Air pressure passes from the pipe 35 through the port37 and from thence through the port 20 and the channel 23 beneath theplunger 11. The

plunger is then elevated until the exhaust port 21 is opened and thepressure is thereupon relieved to permit the table to drop back and bejolted by contact with the fibre pieces 13 on the base 10. The air fromthe port 21 passes out through the exhaust port 38, the recess 40 andthe4 final exhaust port 39. So long as the handle 29 is in this positionthe jolting of the liask will continue.

sition the port 37 and final exhaust port 39 are covered by the bodymember 27 and the port 36 is open to the cylindrical opening 26. Airpressure passes from. the pipe 35 through port 36, port 22, recess' 24to raise the plunger 11 until stopped by mechanism to be describedlater. The air cannot pass out of the kports 20 and 21 because of theclosure of4 the corresponding ports in the valve. f On the ends of eachof the stripper rods 15 I provide permanent stops in the form of nuts 45and also washers 46 and short springs 47. As the table 12 is` raised,the springs 47 `contact with lugs on the base 10 to prevent unduejarring and the permanent stops 45 preventthe table from being raisedunduly. i v Y I provide locking means for locking the stripper rods 15and the parts carried thereby in their uppermost position. `Theselocking means may form illustrated they consist of a pair of shafts 48extending across the machine and mounted in suitable bearings in thebase 10. Each of these shafts is provided `with levers 49 which areconnected by a linlr50. One of vthese shafts is provided with a-handle51 the turning otwhich will cause the two shafts 48 to be rotatedthrough the levers be widely varied but in the the shafts 48 intersectthe rods 15 and in order to permit the rods 15 to pass I cut away aportion of the shafts 48, as shown in Figure 1, leaving a half roundportion 52. On the lowerlportion of the rods 15 I cut a recess 53 ofsuch a form that when the rods 15 are raised to their highest position,the shafts 48 may be rotated so as to bring the half round portion 52against' the end of thel recess 53 thus locking the rods 15 in theirhighest positions.

With the rods 15 so locked, the handle 29 is turned to bring the detent30 into the notch 34. This turns the body member 27 so that the ports 36and 37 are covered while the recess 40 still connects the ports 38 and39. Consequently, all air pressure be` neath the plunger-fis cut oft'and the air therein is permitted to pass out .through the ports 21, 38and 39, thus allowing the plunger 11 and the table 12 to return to thenormal position shown in Figure 1. Since therods 15 are lockedagainstsuchA return, however, there results a drawingof the pattern fromthe mold Vsince the pattern and ioo its plate 18 restupon and may beattached Before the hanmit the parts to return .to the position of Fig.1, I prefer to again raise the table 12 until it supports the plate 14and the empty flask. Then, when the handle 29 is turned to releaseposition, the parts drop as the air passes from beneath the plunger.

While I have illustrated my preferred form, it is obvious that thearrangement may be varied within wide limits.

What I claim and desire to secure by Letters Patent of the United Statesis 1. In a combination jolt-ramming and stripping machine, a tablehaving a plunger attached thereto, said table being adapted to carry thepattern and the flask, stripping means supported on said table andadapted to move independently thereof, a cylinder for said plunger andmeans to admit fluid pressure beneath said plunger, comprising ports insaid cylinder and a multiple-way valve constructed and arranged to admitthe fluid pressure to jolt said table when the valve is in the firstposition, and to elevate said table to a greater distance and to hold itin such elevated position when the valve is in the second position andto release the pressure to permit said table to drop when the valve isin the third position, said stripping means including vertical rodsprovided with stops to limit the upward motion of the table, and meansengaging said rods to lock said stripping means in its highest positionwhen said table is permitted to drop, and elastic means to act as abuffer when the table reaches its upper position.

2. In a combination jolt-ramming and stripping machine, a table having'a plunger attached thereto, said table being adapted to carry thepattern and the flask, stripping means supported on said tableand'adapted to move independently thereof, a cylinder for said plungerand means to admit fluid pressure beneath said plunger, comprising ajolting port, an elevating port and an exhaust port in said cylinder anda multipleway valve between a source of fluid pressure and sand ports,said valve being constructed and arranged, when in its rst position, toconnect said source of pressure with said joltingr` port and to opensaid exhaust port and close said elevating port, and when in its secondposition, to connect said elevating port with said source and to closesaid iolting port and said exhaust port, and when in its third position,to open said exhaust port pressure beneath said and said and to closesaid elevating and said jolting ports, and means to lock said strippingmeans in its highest position when said table is permitted to drop.

3. In a combination jolt-ramming and stripping machine, a table having aplunger attached thereto, said table being adapted to carry the patternand the flask, stripping means supported on said table and adapted tomove independently thereof, a cylinder for said plunger and means toadmit fluid plunger, comprising a jolting port, an elevating port and anexhaust port in said cylinder and a multipleway valve between a sourceof fluid pressure ports, said valve having av casing with a cylindricalopening therein, and a jolting port, an exhaust port and an elevatingport opening into said cylindrical opening, each connected by suitablepiping to the corresponding ports in said cylinder, said cylinderopening also being provided with a connection to a source of fluidpressure and a final exhaust port, a cylindrical body member rotatablymounted in said opening and `having a recess in its surface, said bodymember being constructed and arranged to be rotated successively fromfirst, to second and to third positions and to open said jolting portand said exhaust and final exhaust ports through said recess when infirst position, to close said jolting port and said exhaust ports and toopen said elevating port when in second position, and to close saidjolting and said elevating ports and to open said exhaust and finalexhaust ports through said recess when in third position, and means tolock said stripping means in its highest position when said table ispermitted to dro i-.p In a combination jolt-ramming and strippingmachine, a table adapted to carry the pattern and the flask, means toelevate said table and permit it to drop, stripping means supported onsaid table and interposed between the flask and said table and adaptedto move independently thereof, said stripping means including aplurality of supporting rods connected thereby, a plurality of lockingdevices adapted to lock said stripping means in its highest positionwhen the table is permitted to drop, a handle and connections between itand each E. L. TOWLE.

- said locking devices.

